On his 54th day in the Vancouver Island wilderness, one in which whipping, frigid wind confined him to a tarped tent that kept flapping in his face, Sam Larson appeared to reach his breaking point on the final episode of “Alone.” “I’m getting some weird seasickness thing from this tarp just banging against my head and just flapping all over the place,” Larson, the 22-year-old contestant from Lincoln, said into one of the cameras he had to operate. “The noise. Everything about it.